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FR571985A - Improvements to speaker devices for wireless telephony - Google Patents

Improvements to speaker devices for wireless telephony

Info

Publication number
FR571985A
FR571985A FR571985DA FR571985A FR 571985 A FR571985 A FR 571985A FR 571985D A FR571985D A FR 571985DA FR 571985 A FR571985 A FR 571985A
Authority
FR
France
Prior art keywords
wireless telephony
speaker devices
speaker
telephony
wireless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Gabriel Gonzalez D Yrarrazaval
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR571985A publication Critical patent/FR571985A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR571985D 1923-08-10 1923-08-10 Improvements to speaker devices for wireless telephony Expired FR571985A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR571985T 1923-08-10

Publications (1)

Publication Number Publication Date
FR571985A true FR571985A (en) 1924-05-27

Family

ID=8950946

Family Applications (1)

Application Number Title Priority Date Filing Date
FR571985D Expired FR571985A (en) 1923-08-10 1923-08-10 Improvements to speaker devices for wireless telephony

Country Status (1)

Country Link
FR (1) FR571985A (en)

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